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Diffstat (limited to 'firmware/zpu/usrp2/memory_map.h')
| -rw-r--r-- | firmware/zpu/usrp2/memory_map.h | 696 |
1 files changed, 696 insertions, 0 deletions
diff --git a/firmware/zpu/usrp2/memory_map.h b/firmware/zpu/usrp2/memory_map.h new file mode 100644 index 000000000..e728a1ddb --- /dev/null +++ b/firmware/zpu/usrp2/memory_map.h @@ -0,0 +1,696 @@ +/* -*- c -*- */ +/* + * Copyright 2007,2008,2009 Free Software Foundation, Inc. + * + * This program is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 3 of the License, or + * (at your option) any later version. + * + * This program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with this program. If not, see <http://www.gnu.org/licenses/>. + */ + +/* Overall Memory Map + * 0000-7FFF 32K RAM space (16K on 1500, 24K on 2000, 32K on DSP) + * 8000-BFFF 16K Packet Router + * C000-FFFF 16K Peripherals + */ + + +#ifndef INCLUDED_MEMORY_MAP_H +#define INCLUDED_MEMORY_MAP_H + +#include <stdint.h> + + +#define MASTER_CLK_RATE 100000000 // 100 MHz + + +//////////////////////////////////////////////////////////////// +// +// Memory map for embedded wishbone bus +// +//////////////////////////////////////////////////////////////// + + +//////////////////////////////////////////////////////////////// +// Main RAM, Slave 0 + +#define RAM_BASE 0x0000 + +//////////////////////////////////////////////////////////////// +// Packet Router RAM, Slave 1 +// +// The buffers themselves are located in Slave 1, Packet Router RAM. +// The status registers are in Slave 5, Packet Router Status. +// The control register is in Slave 7, Settings Bus. + +#define ROUTER_RAM_BASE 0x8000 + +///////////////////////////////////////////////////// +// SPI Core, Slave 2. See core docs for more info +#define SPI_BASE 0xC000 // Base address (16-bit) + +typedef struct { + volatile uint32_t txrx0; + volatile uint32_t txrx1; + volatile uint32_t txrx2; + volatile uint32_t txrx3; + volatile uint32_t ctrl; + volatile uint32_t div; + volatile uint32_t ss; +} spi_regs_t; + +#define spi_regs ((spi_regs_t *) SPI_BASE) + + +// Masks for controlling different peripherals +#define SPI_SS_AD9510 1 +#define SPI_SS_AD9777 2 +#define SPI_SS_RX_DAC 4 +#define SPI_SS_RX_ADC 8 +#define SPI_SS_RX_DB 16 +#define SPI_SS_TX_DAC 32 +#define SPI_SS_TX_ADC 64 +#define SPI_SS_TX_DB 128 +#define SPI_SS_ADS64P44 256 + +// Masks for different parts of CTRL reg +#define SPI_CTRL_ASS (1<<13) +#define SPI_CTRL_IE (1<<12) +#define SPI_CTRL_LSB (1<<11) +#define SPI_CTRL_TXNEG (1<<10) +#define SPI_CTRL_RXNEG (1<< 9) +#define SPI_CTRL_GO_BSY (1<< 8) +#define SPI_CTRL_CHAR_LEN_MASK 0x7F + +//////////////////////////////////////////////// +// I2C, Slave 3 +// See Wishbone I2C-Master Core Specification. + +#define I2C_BASE 0xC400 + +typedef struct { + volatile uint32_t prescaler_lo; // r/w + volatile uint32_t prescaler_hi; // r/w + volatile uint32_t ctrl; // r/w + volatile uint32_t data; // wr = transmit reg; rd = receive reg + volatile uint32_t cmd_status; // wr = command reg; rd = status reg +} i2c_regs_t; + +#define i2c_regs ((i2c_regs_t *) I2C_BASE) + +#define I2C_CTRL_EN (1 << 7) // core enable +#define I2C_CTRL_IE (1 << 6) // interrupt enable + +// +// STA, STO, RD, WR, and IACK bits are cleared automatically +// +#define I2C_CMD_START (1 << 7) // generate (repeated) start condition +#define I2C_CMD_STOP (1 << 6) // generate stop condition +#define I2C_CMD_RD (1 << 5) // read from slave +#define I2C_CMD_WR (1 << 4) // write to slave +#define I2C_CMD_NACK (1 << 3) // when a rcvr, send ACK (ACK=0) or NACK (ACK=1) +#define I2C_CMD_RSVD_2 (1 << 2) // reserved +#define I2C_CMD_RSVD_1 (1 << 1) // reserved +#define I2C_CMD_IACK (1 << 0) // set to clear pending interrupt + +#define I2C_ST_RXACK (1 << 7) // Received acknowledgement from slave (1 = NAK, 0 = ACK) +#define I2C_ST_BUSY (1 << 6) // 1 after START signal detected; 0 after STOP signal detected +#define I2C_ST_AL (1 << 5) // Arbitration lost. 1 when core lost arbitration +#define I2C_ST_RSVD_4 (1 << 4) // reserved +#define I2C_ST_RSVD_3 (1 << 3) // reserved +#define I2C_ST_RSVD_2 (1 << 2) // reserved +#define I2C_ST_TIP (1 << 1) // Transfer-in-progress +#define I2C_ST_IP (1 << 0) // Interrupt pending + + +//////////////////////////////////////////////// +// GPIO, Slave 4 +// +// These go to the daughterboard i/o pins + +#define GPIO_BASE 0xC800 + +typedef struct { + volatile uint32_t io; // tx data in high 16, rx in low 16 + volatile uint32_t ddr; // 32 bits, 1 means output. tx in high 16, rx in low 16 + volatile uint32_t tx_sel; // 16 2-bit fields select which source goes to TX DB + volatile uint32_t rx_sel; // 16 2-bit fields select which source goes to RX DB +} gpio_regs_t; + +// each 2-bit sel field is layed out this way +#define GPIO_SEL_SW 0 // if pin is an output, set by software in the io reg +#define GPIO_SEL_ATR 1 // if pin is an output, set by ATR logic +#define GPIO_SEL_DEBUG_0 2 // if pin is an output, debug lines from FPGA fabric +#define GPIO_SEL_DEBUG_1 3 // if pin is an output, debug lines from FPGA fabric + +#define gpio_base ((gpio_regs_t *) GPIO_BASE) + +/////////////////////////////////////////////////// +// Packet Router Status, Slave 5 +// +// The buffers themselves are located in Slave 1, Packet Router RAM. +// The status registers are in Slave 5, Packet Router Status. +// The control register is in Slave 7, Settings Bus. + +#define ROUTER_STATUS_BASE 0xCC00 + +typedef struct { + volatile uint32_t _padding[8]; + volatile uint32_t status; + volatile uint32_t hw_config; // see below + volatile uint32_t time64_secs_rb; + volatile uint32_t time64_ticks_rb; + volatile uint32_t compat_num; + volatile uint32_t irqs; +} router_status_t; + +#define router_status ((router_status_t *) ROUTER_STATUS_BASE) + +// The hw_config register + +#define HWC_SIMULATION 0x80000000 +#define HWC_WB_CLK_DIV_MASK 0x0000000f + +/*! + * \brief return non-zero if we're running under the simulator + */ +inline static int +hwconfig_simulation_p(void) +{ + return router_status->hw_config & HWC_SIMULATION; +} + +/*! + * \brief Return Wishbone Clock divisor. + * The processor runs at the Wishbone Clock rate which is MASTER_CLK_RATE / divisor. + */ +inline static int +hwconfig_wishbone_divisor(void) +{ + return router_status->hw_config & HWC_WB_CLK_DIV_MASK; +} + +/////////////////////////////////////////////////// +// Ethernet Core, Slave 6 + +#define ETH_BASE 0xD000 + +#include "eth_mac_regs.h" + +#define eth_mac ((eth_mac_regs_t *) ETH_BASE) + +//////////////////////////////////////////////////// +// Settings Bus, Slave #7, Not Byte Addressable! +// +// Output-only from processor point-of-view. +// 1KB of address space (== 256 32-bit write-only regs) + + +#define MISC_OUTPUT_BASE 0xD400 +#define TX_PROTOCOL_ENGINE_BASE 0xD480 +#define RX_PROTOCOL_ENGINE_BASE 0xD4C0 +#define ROUTER_CTRL_BASE 0xD500 +#define LAST_SETTING_REG 0xD7FC // last valid setting register + +#define SR_MISC 0 +#define SR_TX_PROT_ENG 32 +#define SR_RX_PROT_ENG 48 +#define SR_ROUTER_CTRL 64 +#define SR_UDP_SM 96 +#define SR_TX_DSP 208 +#define SR_TX_CTRL 224 +#define SR_RX_DSP 160 +#define SR_RX_CTRL 176 +#define SR_TIME64 192 +#define SR_SIMTIMER 198 +#define SR_LAST 255 + +#define _SR_ADDR(sr) (MISC_OUTPUT_BASE + (sr) * sizeof(uint32_t)) + +// --- packet router control regs --- + +typedef struct { + volatile uint32_t mode_ctrl; + volatile uint32_t ip_addr; + volatile uint32_t data_ports; //dsp0 (low 16) dsp1 (high 16) + volatile uint32_t iface_ctrl; +} router_ctrl_t; + +#define router_ctrl ((router_ctrl_t *) ROUTER_CTRL_BASE) + +// --- misc outputs --- + +typedef struct { + volatile uint32_t clk_ctrl; + volatile uint32_t serdes_ctrl; + volatile uint32_t adc_ctrl; + volatile uint32_t leds; + volatile uint32_t phy_ctrl; // LSB is reset line to eth phy + volatile uint32_t debug_mux_ctrl; + volatile uint32_t ram_page; // FIXME should go somewhere else... + volatile uint32_t flush_icache; // Flush the icache + volatile uint32_t led_src; // HW or SW control for LEDs +} output_regs_t; + +#define CLK_RESET (1<<4) +#define CLK_ENABLE (1<<3) | (1<<2) +#define CLK_SEL (1<<1) | (1<<0) + +#define SERDES_ENABLE 8 +#define SERDES_PRBSEN 4 +#define SERDES_LOOPEN 2 +#define SERDES_RXEN 1 + +#define ADC_CTRL_ON 0x0F +#define ADC_CTRL_OFF 0x00 + +// crazy order that matches the labels on the case + +#define LED_A (1 << 4) +#define LED_B (1 << 1) +#define LED_C (1 << 3) +#define LED_D (1 << 0) +#define LED_E (1 << 2) +// LED_F // controlled by CPLD +#define LED_RJ45 (1 << 5) + +#define output_regs ((output_regs_t *) MISC_OUTPUT_BASE) + +// --- udp tx regs --- + +typedef struct { + // Bits 19:16 are control info; bits 15:0 are data (see below) + // First two words are unused. + volatile uint32_t _nope[2]; + //--- ethernet header - 14 bytes--- + volatile struct{ + uint32_t mac_dst_0_1; //word 2 + uint32_t mac_dst_2_3; + uint32_t mac_dst_4_5; + uint32_t mac_src_0_1; + uint32_t mac_src_2_3; + uint32_t mac_src_4_5; + uint32_t ether_type; //word 8 + } eth_hdr; + //--- ip header - 20 bytes --- + volatile struct{ + uint32_t ver_ihl_tos; //word 9 + uint32_t total_length; + uint32_t identification; + uint32_t flags_frag_off; + uint32_t ttl_proto; + uint32_t checksum; + uint32_t src_addr_high; + uint32_t src_addr_low; + uint32_t dst_addr_high; + uint32_t dst_addr_low; //word 18 + } ip_hdr; + //--- udp header - 8 bytes --- + volatile struct{ + uint32_t src_port; //word 19 + uint32_t dst_port; + uint32_t length; + uint32_t checksum; //word 22 + } udp_hdr; + volatile uint32_t _pad[1]; + volatile uint32_t dsp0_port; + volatile uint32_t err0_port; + volatile uint32_t dsp1_port; + volatile uint32_t err1_port; +} sr_udp_sm_t; + +// control bits (all expect UDP_SM_LAST_WORD are mutually exclusive) + +// Insert a UDP source port from the table +#define UDP_SM_INS_UDP_SRC_PORT (1 << 21) + +// Insert a UDP dest port from the table +#define UDP_SM_INS_UDP_DST_PORT (1 << 20) + +// This is the last word of the header +#define UDP_SM_LAST_WORD (1 << 19) + +// Insert IP header checksum here. Data is the xor of 16'hFFFF and +// the values written into regs 9-13 and 15-18. +#define UDP_SM_INS_IP_HDR_CHKSUM (1 << 18) + +// Insert IP Length here (data ignored) +#define UDP_SM_INS_IP_LEN (1 << 17) + +// Insert UDP Length here (data ignore) +#define UDP_SM_INS_UDP_LEN (1 << 16) + +#define sr_udp_sm ((sr_udp_sm_t *) _SR_ADDR(SR_UDP_SM)) + +// --- dsp tx regs --- + +#define MIN_CIC_INTERP 1 +#define MAX_CIC_INTERP 128 + +typedef struct { + volatile uint32_t num_chan; + volatile uint32_t clear_state; // clears out state machine, fifos, + volatile uint32_t report_sid; + volatile uint32_t policy; + volatile uint32_t cyc_per_up; + volatile uint32_t packets_per_up; +} sr_tx_ctrl_t; + +#define sr_tx_ctrl ((sr_tx_ctrl_t *) _SR_ADDR(SR_TX_CTRL)) + +typedef struct { + volatile int32_t freq; + volatile uint32_t scale_iq; // {scale_i,scale_q} + volatile uint32_t interp_rate; + volatile uint32_t _padding0; // padding for the tx_mux + // NOT freq, scale, interp + /*! + * \brief output mux configuration. + * + * <pre> + * 3 2 1 + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * +-------------------------------+-------+-------+-------+-------+ + * | | DAC1 | DAC0 | + * +-------------------------------+-------+-------+-------+-------+ + * + * There are N DUCs (1 now) with complex inputs and outputs. + * There are two DACs. + * + * Each 4-bit DACx field specifies the source for the DAC + * Each subfield is coded like this: + * + * 3 2 1 0 + * +-------+ + * | N | + * +-------+ + * + * N specifies which DUC output is connected to this DAC. + * + * N which interp output + * --- ------------------- + * 0 DUC 0 I + * 1 DUC 0 Q + * 2 DUC 1 I + * 3 DUC 1 Q + * F All Zeros + * + * The default value is 0x10 + * </pre> + */ + volatile uint32_t tx_mux; + +} dsp_tx_regs_t; + +#define dsp_tx_regs ((dsp_tx_regs_t *) _SR_ADDR(SR_TX_DSP)) + +// --- VITA RX CTRL regs --- +typedef struct { + // The following 3 are logically a single command register. + // They are clocked into the underlying fifo when time_ticks is written. + volatile uint32_t cmd; // {now, chain, num_samples(30) + volatile uint32_t time_secs; + volatile uint32_t time_ticks; + + volatile uint32_t clear_overrun; // write anything to clear overrun + volatile uint32_t vrt_header; // word 0 of packet. FPGA fills in packet counter + volatile uint32_t vrt_stream_id; // word 1 of packet. + volatile uint32_t vrt_trailer; + volatile uint32_t nsamples_per_pkt; + volatile uint32_t nchannels; // 1 in basic case, up to 4 for vector sources + volatile uint32_t pad[7]; // Make each structure 16 elements long +} sr_rx_ctrl_t; + +#define sr_rx_ctrl ((sr_rx_ctrl_t *) _SR_ADDR(SR_RX_CTRL)) + +// --- dsp rx regs --- +#define MIN_CIC_DECIM 1 +#define MAX_CIC_DECIM 128 + +typedef struct { + volatile int32_t freq; + volatile uint32_t scale_iq; // {scale_i,scale_q} + volatile uint32_t decim_rate; + volatile uint32_t dcoffset_i; // Bit 31 high sets fixed offset mode, using lower 14 bits, + // otherwise it is automatic + volatile uint32_t dcoffset_q; // Bit 31 high sets fixed offset mode, using lower 14 bits + + /*! + * \brief input mux configuration. + * + * This determines which ADC (or constant zero) is connected to + * each DDC input. There are N DDCs (1 now). Each has two inputs. + * + * <pre> + * Mux value: + * + * 3 2 1 + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * +-------+-------+-------+-------+-------+-------+-------+-------+ + * | |Q0 |I0 | + * +-------+-------+-------+-------+-------+-------+-------+-------+ + * + * Each 2-bit I field is either 00 (A/D A), 01 (A/D B) or 1X (const zero) + * Each 2-bit Q field is either 00 (A/D A), 01 (A/D B) or 1X (const zero) + * + * The default value is 0x4 + * </pre> + */ + volatile uint32_t rx_mux; // called adc_mux in dsp_core_rx.v + + /*! + * \brief Streaming GPIO configuration + * + * This determines whether the LSBs of I and Q samples come from the DSP + * pipeline or from the io_rx GPIO pins. To stream GPIO, one must first + * set the GPIO data direction register to have io_rx[15] and/or io_rx[14] + * configured as inputs. The GPIO pins will be sampled at the time the + * remainder of the DSP sample is strobed into the RX sample FIFO. There + * will be a decimation-dependent fixed time offset between the GPIO + * sample stream and the associated RF samples. + * + * 3 2 1 + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * +-------+-------+-------+-------+-------+-------+-------+-------+ + * | MBZ |Q|I| + * +-------+-------+-------+-------+-------+-------+-------+-------+ + * + * I 0=LSB comes from DSP pipeline (default) + * 1=LSB comes from io_rx[15] + * + * Q 0=LSB comes from DSP pipeline (default) + * 1=LSB comes from io_rx[14] + */ + volatile uint32_t gpio_stream_enable; + +} dsp_rx_regs_t; + +#define dsp_rx_regs ((dsp_rx_regs_t *) _SR_ADDR(SR_RX_DSP)) + +// ---------------------------------------------------------------- +// VITA49 64 bit time (write only) + /*! + * \brief Time 64 flags + * + * <pre> + * + * 3 2 1 + * 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 + * +-----------------------------------------------------------+-+-+ + * | |S|P| + * +-----------------------------------------------------------+-+-+ + * + * P - PPS edge selection (0=negedge, 1=posedge, default=0) + * S - Source (0=sma, 1=mimo, 0=default) + * + * </pre> + */ +typedef struct { + volatile uint32_t secs; // value to set absolute secs to on next PPS + volatile uint32_t ticks; // value to set absolute ticks to on next PPS + volatile uint32_t flags; // flags - see chart above + volatile uint32_t imm; // set immediate (0=latch on next pps, 1=latch immediate, default=0) +} sr_time64_t; + +#define sr_time64 ((sr_time64_t *) _SR_ADDR(SR_TIME64)) + + +/* + * --- ethernet tx protocol engine regs (write only) --- + * + * These registers control the transmit portion of the ethernet + * protocol engine (out of USRP2). The protocol engine handles fifo + * status and sequence number insertion in outgoing packets, and + * automagically generates status packets when required to inform the + * host of changes in fifo availability. + * + * All outgoing packets have their fifo_status field set to the number + * of 32-bit lines of fifo available in the ethernet Rx fifo (see + * usrp2_eth_packet.h). Seqno's are set if FIXME, else 0. + * + * FIXME clean this up once we know how it's supposed to behave. + */ + +typedef struct { + volatile uint32_t flags; // not yet fully defined (channel?) + volatile uint32_t mac_dst0123; // 4 bytes of destination mac addr + volatile uint32_t mac_dst45src01; // 2 bytes of dest mac addr; 2 bytes of src mac addr + volatile uint32_t mac_src2345; // 4 bytes of destination mac addr + volatile uint32_t seqno; // Write to init seqno. It autoincs on match +} tx_proto_engine_regs_t; + +#define tx_proto_engine ((tx_proto_engine_regs_t *) TX_PROTOCOL_ENGINE_BASE) + +/* + * --- ethernet rx protocol engine regs (write only) --- + * + * These registers control the receive portion of the ethernet + * protocol engine (into USRP2). The protocol engine offloads common + * packet inspection operations so that firmware has less to do on + * "fast path" packets. + * + * The registers define conditions which must be matched for a packet + * to be considered a "fast path" packet. If a received packet + * matches the src and dst mac address, ethertype, flags field, and + * expected seqno number it is considered a "fast path" packet, and + * the expected seqno is updated. If the packet fails to satisfy any + * of the above conditions it's a "slow path" packet, and the + * corresponding SLOWPATH flag will be set buffer_status register. + */ + +typedef struct { + volatile uint32_t flags; // not yet fully defined (channel?) + volatile uint32_t mac_dst0123; // 4 bytes of destination mac addr + volatile uint32_t mac_dst45src01; // 2 bytes of dest mac addr; 2 bytes of src mac addr + volatile uint32_t mac_src2345; // 4 bytes of destination mac addr + volatile uint32_t ethertype_pad; // ethertype in high 16-bits +} rx_proto_engine_regs_t; + +#define rx_proto_engine ((rx_proto_engine_regs_t *) RX_PROTOCOL_ENGINE_BASE) + + + +/////////////////////////////////////////////////// +// Simple Programmable Interrupt Controller, Slave 8 + +#define PIC_BASE 0xD800 + +// Interrupt request lines +// Bit numbers (LSB == 0) that correpond to interrupts into PIC + +#define IRQ_BUFFER 0 // buffer manager +#define IRQ_ONETIME 1 +#define IRQ_SPI 2 +#define IRQ_I2C 3 +#define IRQ_PHY 4 // ethernet PHY +#define IRQ_UNDERRUN 5 +#define IRQ_OVERRUN 6 +#define IRQ_PPS 7 // pulse per second +#define IRQ_UART_RX 8 +#define IRQ_UART_TX 9 +#define IRQ_SERDES 10 +#define IRQ_CLKSTATUS 11 +#define IRQ_PERIODIC 12 + +#define IRQ_TO_MASK(x) (1 << (x)) + +#define PIC_BUFFER_INT IRQ_TO_MASK(IRQ_BUFFER) +#define PIC_ONETIME_INT IRQ_TO_MASK(IRQ_ONETIME) +#define PIC_SPI_INT IRQ_TO_MASK(IRQ_SPI) +#define PIC_I2C_INT IRQ_TO_MASK(IRQ_I2C) +#define PIC_PHY_INT IRQ_TO_MASK(IRQ_PHY) +#define PIC_UNDERRUN_INT IRQ_TO_MASK(IRQ_UNDERRUN) +#define PIC_OVERRUN_INT IRQ_TO_MASK(IRQ_OVERRUN) +#define PIC_PPS_INT IRQ_TO_MASK(IRQ_PPS) +#define PIC_UART_RX_INT IRQ_TO_MASK(IRQ_UART_RX) +#define PIC_UART_TX_INT IRQ_TO_MASK(IRQ_UART_TX) +#define PIC_SERDES IRQ_TO_MASK(IRQ_SERDES) +#define PIC_CLKSTATUS IRQ_TO_MASK(IRQ_CLKSTATUS) + +typedef struct { + volatile uint32_t edge_enable; // mask: 1 -> edge triggered, 0 -> level + volatile uint32_t polarity; // mask: 1 -> rising edge + volatile uint32_t mask; // mask: 1 -> disabled + volatile uint32_t pending; // mask: 1 -> pending; write 1's to clear pending ints +} pic_regs_t; + +#define pic_regs ((pic_regs_t *) PIC_BASE) + +// ---------------------------------------------------------------- +// WB_CLK_RATE is the time base for this +typedef struct { + volatile uint32_t onetime; // Number of wb clk cycles till the onetime interrupt + volatile uint32_t periodic; // Repeat rate of periodic interrupt +} sr_simple_timer_t; + +#define sr_simple_timer ((sr_simple_timer_t *) _SR_ADDR(SR_SIMTIMER)) + +/////////////////////////////////////////////////// +// UART, Slave 10 + +#define UART_BASE 0xE000 + +typedef struct { + // All elements are 8 bits except for clkdiv (16), but we use uint32 to make + // the hardware for decoding easier + volatile uint32_t clkdiv; // Set to 50e6 divided by baud rate (no x16 factor) + volatile uint32_t txlevel; // Number of spaces in the FIFO for writes + volatile uint32_t rxlevel; // Number of available elements in the FIFO for reads + volatile uint32_t txchar; // Write characters to be sent here + volatile uint32_t rxchar; // Read received characters here +} uart_regs_t; + +#define uart_regs ((uart_regs_t *) UART_BASE) + +/////////////////////////////////////////////////// +// ATR Controller, Slave 11 + +#define ATR_BASE 0xE400 + +typedef struct { + volatile uint32_t v[16]; +} atr_regs_t; + +#define ATR_IDLE 0x0 // indicies into v +#define ATR_TX 0x1 +#define ATR_RX 0x2 +#define ATR_FULL 0x3 + +#define atr_regs ((atr_regs_t *) ATR_BASE) + +/////////////////////////////////////////////////// +// SD Card SPI interface, Slave 13 +// All regs are 8 bits wide, but are accessed as if they are 32 bits + +#define SDSPI_BASE 0xEC00 + +typedef struct { + volatile uint32_t status; // Write a 1 or 0 for controlling CS + volatile uint32_t clkdiv; + volatile uint32_t send_dat; + volatile uint32_t receive_dat; +} sdspi_regs_t; + +#define sdspi_regs ((sdspi_regs_t *) SDSPI_BASE) + +/////////////////////////////////////////////////// +// External RAM interface, Slave 14 +// Pages are 1K. Page is 10 bits, set by a control register +// output_regs->ram_page + +#define EXTRAM_BASE 0xF000 +#define extram ((volatile uint32_t *) EXTRAM_BASE) + + +/////////////////////////////////////////////////// + +#endif + |